Spin Wave Power Flow and Caustics in Ultrathin Ferromagnets with the Dzyaloshinskii-Moriya Interaction
Reference: J.-V. Kim, R. L. Stamps, and R. E. Camley, Phys. Rev. Lett. 117, 197204 (2016).
We examined how the Dzyaloshinskii-Moriya interaction (DMI) influences the flow of spin waves in ultrathin films using analytical theory and micromagnetics simulations. With a point source field excitation, we find a number of different propagation regimes, such as caustics and interference patterns that are asymmetric as a result of the DMI. This work has just appeared in Physical Review Letters.